<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="https://uicdn.toast.com/calendar/latest/toastui-calendar.min.css" />
    <script src="https://uicdn.toast.com/calendar/latest/toastui-calendar.min.js"></script>
</head>

<body>
    <div id="calendar" style="height: 600px;"></div>
    <script>
        const container = document.getElementById('calendar');
        const options = {
            defaultView: 'day',
            calendars: [
                {
                    id: 'cal1',
                    name: 'Personal',
                    backgroundColor: '#03bd9e',
                },
                {
                    id: 'cal2',
                    name: 'Work',
                    backgroundColor: '#00a9ff',
                },
            ],
        };

        const calendar = new tui.Calendar(container, options);
    </script>
</body>

</html>